magnum/src/Magnum/Test/TextureGLTest.cpp

/*
    This file is part of Magnum.

    Copyright © 2010, 2011, 2012, 2013, 2014, 2015
              Vladimír Vondruš <mosra@centrum.cz>

    Permission is hereby granted, free of charge, to any person obtaining a
    copy of this software and associated documentation files (the "Software"),
    to deal in the Software without restriction, including without limitation
    the rights to use, copy, modify, merge, publish, distribute, sublicense,
    and/or sell copies of the Software, and to permit persons to whom the
    Software is furnished to do so, subject to the following conditions:

    The above copyright notice and this permission notice shall be included
    in all copies or substantial portions of the Software.

    THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
    IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
    FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
    THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
    LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
    FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
    DEALINGS IN THE SOFTWARE.
*/

#include <Corrade/TestSuite/Compare/Container.h>

#include "Magnum/configure.h"
#ifndef MAGNUM_TARGET_GLES2
#include "Magnum/BufferImage.h"
#endif
#include "Magnum/Color.h"
#include "Magnum/ColorFormat.h"
#include "Magnum/Image.h"
#include "Magnum/Texture.h"
#include "Magnum/TextureFormat.h"
#include "Magnum/Math/Range.h"
#include "Magnum/Test/AbstractOpenGLTester.h"

namespace Magnum { namespace Test {

struct TextureGLTest: AbstractOpenGLTester {
    explicit TextureGLTest();

    #ifndef MAGNUM_TARGET_GLES
    void construct1D();
    #endif
    void construct2D();
    void construct3D();

    #ifndef MAGNUM_TARGET_GLES
    void wrap1D();
    #endif
    void wrap2D();
    void wrap3D();

    #ifndef MAGNUM_TARGET_GLES
    void bind1D();
    #endif
    void bind2D();
    void bind3D();

    #ifndef MAGNUM_TARGET_GLES
    void sampling1D();
    #endif
    void sampling2D();
    void sampling3D();

    #ifndef MAGNUM_TARGET_GLES
    void samplingSRGBDecode1D();
    #endif
    void samplingSRGBDecode2D();
    void samplingSRGBDecode3D();

    #ifndef MAGNUM_TARGET_GLES2
    #ifndef MAGNUM_TARGET_GLES
    void samplingSwizzle1D();
    #endif
    void samplingSwizzle2D();
    void samplingSwizzle3D();
    #else
    void samplingMaxLevel2D();
    void samplingMaxLevel3D();
    void samplingCompare2D();
    #endif

    #ifndef MAGNUM_TARGET_GLES
    void samplingBorderInteger2D();
    void samplingBorderInteger3D();
    void samplingDepthStencilMode1D();
    #endif
    #ifndef MAGNUM_TARGET_GLES2
    void samplingDepthStencilMode2D();
    void samplingDepthStencilMode3D();
    #endif
    #ifdef MAGNUM_TARGET_GLES
    void samplingBorder2D();
    void samplingBorder3D();
    #endif

    #ifndef MAGNUM_TARGET_GLES
    void storage1D();
    #endif
    void storage2D();
    void storage3D();

    #ifndef MAGNUM_TARGET_GLES
    void image1D();
    #endif
    #ifndef MAGNUM_TARGET_GLES2
    void image1DBuffer();
    #endif
    void image2D();
    #ifndef MAGNUM_TARGET_GLES2
    void image2DBuffer();
    #endif
    void image3D();
    #ifndef MAGNUM_TARGET_GLES2
    void image3DBuffer();
    #endif

    #ifndef MAGNUM_TARGET_GLES
    void subImage1D();
    void subImage1DBuffer();
    void subImage1DQuery();
    void subImage1DQueryBuffer();
    #endif
    void subImage2D();
    #ifndef MAGNUM_TARGET_GLES2
    void subImage2DBuffer();
    #endif
    #ifndef MAGNUM_TARGET_GLES
    void subImage2DQuery();
    void subImage2DQueryBuffer();
    #endif
    void subImage3D();
    #ifndef MAGNUM_TARGET_GLES2
    void subImage3DBuffer();
    #endif
    #ifndef MAGNUM_TARGET_GLES
    void subImage3DQuery();
    void subImage3DQueryBuffer();
    #endif

    #ifndef MAGNUM_TARGET_GLES
    void generateMipmap1D();
    #endif
    void generateMipmap2D();
    void generateMipmap3D();

    #ifndef MAGNUM_TARGET_GLES
    void invalidateImage1D();
    #endif
    void invalidateImage2D();
    void invalidateImage3D();

    #ifndef MAGNUM_TARGET_GLES
    void invalidateSubImage1D();
    #endif
    void invalidateSubImage2D();
    void invalidateSubImage3D();
};

TextureGLTest::TextureGLTest() {
    addTests({
        #ifndef MAGNUM_TARGET_GLES
        &TextureGLTest::construct1D,
        #endif
        &TextureGLTest::construct2D,
        &TextureGLTest::construct3D,

        #ifndef MAGNUM_TARGET_GLES
        &TextureGLTest::wrap1D,
        #endif
        &TextureGLTest::wrap2D,
        &TextureGLTest::wrap3D,

        #ifndef MAGNUM_TARGET_GLES
        &TextureGLTest::bind1D,
        #endif
        &TextureGLTest::bind2D,
        &TextureGLTest::bind3D,

        #ifndef MAGNUM_TARGET_GLES
        &TextureGLTest::sampling1D,
        #endif
        &TextureGLTest::sampling2D,
        &TextureGLTest::sampling3D,

        #ifndef MAGNUM_TARGET_GLES
        &TextureGLTest::samplingSRGBDecode1D,
        #endif
        &TextureGLTest::samplingSRGBDecode2D,
        &TextureGLTest::samplingSRGBDecode3D,

        #ifndef MAGNUM_TARGET_GLES2
        #ifndef MAGNUM_TARGET_GLES
        &TextureGLTest::samplingSwizzle1D,
        #endif
        &TextureGLTest::samplingSwizzle2D,
        &TextureGLTest::samplingSwizzle3D,
        #else
        &TextureGLTest::samplingMaxLevel2D,
        &TextureGLTest::samplingMaxLevel3D,
        &TextureGLTest::samplingCompare2D,
        #endif

        #ifndef MAGNUM_TARGET_GLES
        &TextureGLTest::samplingBorderInteger2D,
        &TextureGLTest::samplingBorderInteger3D,
        &TextureGLTest::samplingDepthStencilMode1D,
        #endif
        #ifndef MAGNUM_TARGET_GLES2
        &TextureGLTest::samplingDepthStencilMode2D,
        &TextureGLTest::samplingDepthStencilMode3D,
        #endif
        #ifdef MAGNUM_TARGET_GLES
        &TextureGLTest::samplingBorder2D,
        &TextureGLTest::samplingBorder3D,
        #endif

        #ifndef MAGNUM_TARGET_GLES
        &TextureGLTest::storage1D,
        #endif
        &TextureGLTest::storage2D,
        &TextureGLTest::storage3D,

        #ifndef MAGNUM_TARGET_GLES
        &TextureGLTest::image1D,
        &TextureGLTest::image1DBuffer,
        #endif
        &TextureGLTest::image2D,
        #ifndef MAGNUM_TARGET_GLES2
        &TextureGLTest::image2DBuffer,
        #endif
        &TextureGLTest::image3D,
        #ifndef MAGNUM_TARGET_GLES2
        &TextureGLTest::image3DBuffer,
        #endif

        #ifndef MAGNUM_TARGET_GLES
        &TextureGLTest::subImage1D,
        &TextureGLTest::subImage1DBuffer,
        &TextureGLTest::subImage1DQuery,
        &TextureGLTest::subImage1DQueryBuffer,
        #endif
        &TextureGLTest::subImage2D,
        #ifndef MAGNUM_TARGET_GLES2
        &TextureGLTest::subImage2DBuffer,
        #endif
        #ifndef MAGNUM_TARGET_GLES
        &TextureGLTest::subImage2DQuery,
        &TextureGLTest::subImage2DQueryBuffer,
        #endif
        &TextureGLTest::subImage3D,
        #ifndef MAGNUM_TARGET_GLES2
        &TextureGLTest::subImage3DBuffer,
        #endif
        #ifndef MAGNUM_TARGET_GLES
        &TextureGLTest::subImage3DQuery,
        &TextureGLTest::subImage3DQueryBuffer,
        #endif

        #ifndef MAGNUM_TARGET_GLES
        &TextureGLTest::generateMipmap1D,
        #endif
        &TextureGLTest::generateMipmap2D,
        &TextureGLTest::generateMipmap3D,

        #ifndef MAGNUM_TARGET_GLES
        &TextureGLTest::invalidateImage1D,
        #endif
        &TextureGLTest::invalidateImage2D,
        &TextureGLTest::invalidateImage3D,

        #ifndef MAGNUM_TARGET_GLES
        &TextureGLTest::invalidateSubImage1D,
        #endif
        &TextureGLTest::invalidateSubImage2D,
        &TextureGLTest::invalidateSubImage3D,
    });
}

#ifndef MAGNUM_TARGET_GLES
void TextureGLTest::construct1D() {
    {
        Texture1D texture;

        MAGNUM_VERIFY_NO_ERROR();
        CORRADE_VERIFY(texture.id() > 0);
    }

    MAGNUM_VERIFY_NO_ERROR();
}
#endif

void TextureGLTest::construct2D() {
    {
        Texture2D texture;

        MAGNUM_VERIFY_NO_ERROR();
        CORRADE_VERIFY(texture.id() > 0);
    }

    MAGNUM_VERIFY_NO_ERROR();
}

void TextureGLTest::construct3D() {
    #ifdef MAGNUM_TARGET_GLES2
    if(!Context::current()->isExtensionSupported<Extensions::GL::OES::texture_3D>())
        CORRADE_SKIP(Extensions::GL::OES::texture_3D::string() + std::string(" is not supported."));
    #endif

    {
        Texture3D texture;

        MAGNUM_VERIFY_NO_ERROR();
        CORRADE_VERIFY(texture.id() > 0);
    }

    MAGNUM_VERIFY_NO_ERROR();
}

#ifndef MAGNUM_TARGET_GLES
void TextureGLTest::wrap1D() {
    GLuint id;
    glGenTextures(1, &id);

    /* Releasing won't delete anything */
    {
        auto texture = Texture1D::wrap(id, ObjectFlag::DeleteOnDestruction);
        CORRADE_COMPARE(texture.release(), id);
    }

    /* ...so we can wrap it again */
    Texture1D::wrap(id);
    glDeleteTextures(1, &id);
}
#endif

void TextureGLTest::wrap2D() {
    GLuint id;
    glGenTextures(1, &id);

    /* Releasing won't delete anything */
    {
        auto texture = Texture2D::wrap(id, ObjectFlag::DeleteOnDestruction);
        CORRADE_COMPARE(texture.release(), id);
    }

    /* ...so we can wrap it again */
    Texture2D::wrap(id);
    glDeleteTextures(1, &id);
}

void TextureGLTest::wrap3D() {
    #ifdef MAGNUM_TARGET_GLES2
    if(!Context::current()->isExtensionSupported<Extensions::GL::OES::texture_3D>())
        CORRADE_SKIP(Extensions::GL::OES::texture_3D::string() + std::string(" is not supported."));
    #endif

    GLuint id;
    glGenTextures(1, &id);

    /* Releasing won't delete anything */
    {
        auto texture = Texture3D::wrap(id, ObjectFlag::DeleteOnDestruction);
        CORRADE_COMPARE(texture.release(), id);
    }

    /* ...so we can wrap it again */
    Texture3D::wrap(id);
    glDeleteTextures(1, &id);
}

#ifndef MAGNUM_TARGET_GLES
void TextureGLTest::bind1D() {
    Texture1D texture;
    texture.bind(15);

    MAGNUM_VERIFY_NO_ERROR();

    AbstractTexture::unbind(15);

    MAGNUM_VERIFY_NO_ERROR();

    AbstractTexture::bind(7, {&texture, nullptr, &texture});

    MAGNUM_VERIFY_NO_ERROR();

    AbstractTexture::unbind(7, 3);

    MAGNUM_VERIFY_NO_ERROR();
}
#endif

void TextureGLTest::bind2D() {
    Texture2D texture;
    texture.bind(15);

    MAGNUM_VERIFY_NO_ERROR();

    AbstractTexture::unbind(15);

    MAGNUM_VERIFY_NO_ERROR();

    AbstractTexture::bind(7, {&texture, nullptr, &texture});

    MAGNUM_VERIFY_NO_ERROR();

    AbstractTexture::unbind(7, 3);

    MAGNUM_VERIFY_NO_ERROR();
}

void TextureGLTest::bind3D() {
    #ifdef MAGNUM_TARGET_GLES2
    if(!Context::current()->isExtensionSupported<Extensions::GL::OES::texture_3D>())
        CORRADE_SKIP(Extensions::GL::OES::texture_3D::string() + std::string(" is not supported."));
    #endif

    Texture3D texture;
    texture.bind(15);

    MAGNUM_VERIFY_NO_ERROR();

    AbstractTexture::unbind(15);

    MAGNUM_VERIFY_NO_ERROR();

    AbstractTexture::bind(7, {&texture, nullptr, &texture});

    MAGNUM_VERIFY_NO_ERROR();

    AbstractTexture::unbind(7, 3);

    MAGNUM_VERIFY_NO_ERROR();
}

#ifndef MAGNUM_TARGET_GLES
void TextureGLTest::sampling1D() {
    Texture1D texture;
    texture.setMinificationFilter(Sampler::Filter::Linear, Sampler::Mipmap::Linear)
           .setMagnificationFilter(Sampler::Filter::Linear)
           .setMinLod(-750.0f)
           .setMaxLod(750.0f)
           .setLodBias(0.5f)
           .setBaseLevel(1)
           .setMaxLevel(750)
           .setWrapping(Sampler::Wrapping::ClampToBorder)
           .setBorderColor(Color3(0.5f))
           .setMaxAnisotropy(Sampler::maxMaxAnisotropy())
           .setCompareMode(Sampler::CompareMode::CompareRefToTexture)
           .setCompareFunction(Sampler::CompareFunction::GreaterOrEqual);

    MAGNUM_VERIFY_NO_ERROR();
}

void TextureGLTest::samplingSRGBDecode1D() {
    if(!Context::current()->isExtensionSupported<Extensions::GL::EXT::texture_sRGB_decode>())
        CORRADE_SKIP(Extensions::GL::EXT::texture_sRGB_decode::string() + std::string(" is not supported."));

    Texture1D texture;
    texture.setSRGBDecode(false);

    MAGNUM_VERIFY_NO_ERROR();
}

void TextureGLTest::samplingSwizzle1D() {
    if(!Context::current()->isExtensionSupported<Extensions::GL::ARB::texture_swizzle>())
        CORRADE_SKIP(Extensions::GL::ARB::texture_swizzle::string() + std::string(" is not supported."));

    Texture1D texture;
    texture.setSwizzle<'b', 'g', 'r', '0'>();

    MAGNUM_VERIFY_NO_ERROR();
}

void TextureGLTest::samplingDepthStencilMode1D() {
    if(!Context::current()->isExtensionSupported<Extensions::GL::ARB::stencil_texturing>())
        CORRADE_SKIP(Extensions::GL::ARB::stencil_texturing::string() + std::string(" is not supported."));

    Texture1D texture;
    texture.setDepthStencilMode(Sampler::DepthStencilMode::StencilIndex);

    MAGNUM_VERIFY_NO_ERROR();
}
#endif

void TextureGLTest::sampling2D() {
    Texture2D texture;
    texture.setMinificationFilter(Sampler::Filter::Linear, Sampler::Mipmap::Linear)
           .setMagnificationFilter(Sampler::Filter::Linear)
           #ifndef MAGNUM_TARGET_GLES2
           .setMinLod(-750.0f)
           .setMaxLod(750.0f)
           #ifndef MAGNUM_TARGET_GLES
           .setLodBias(0.5f)
           #endif
           .setBaseLevel(1)
           .setMaxLevel(750)
           #endif
           #ifndef MAGNUM_TARGET_GLES
           .setWrapping(Sampler::Wrapping::ClampToBorder)
           .setBorderColor(Color3(0.5f))
           #else
           .setWrapping(Sampler::Wrapping::ClampToEdge)
           #endif
           .setMaxAnisotropy(Sampler::maxMaxAnisotropy())
           .setCompareMode(Sampler::CompareMode::CompareRefToTexture)
           .setCompareFunction(Sampler::CompareFunction::GreaterOrEqual);

    MAGNUM_VERIFY_NO_ERROR();
}

void TextureGLTest::samplingSRGBDecode2D() {
    #ifdef MAGNUM_TARGET_GLES2
    if(!Context::current()->isExtensionSupported<Extensions::GL::EXT::sRGB>())
        CORRADE_SKIP(Extensions::GL::EXT::sRGB::string() + std::string(" is not supported."));
    #endif
    if(!Context::current()->isExtensionSupported<Extensions::GL::EXT::texture_sRGB_decode>())
        CORRADE_SKIP(Extensions::GL::EXT::texture_sRGB_decode::string() + std::string(" is not supported."));

    Texture2D texture;
    texture.setSRGBDecode(false);

    MAGNUM_VERIFY_NO_ERROR();
}

#ifndef MAGNUM_TARGET_GLES2
void TextureGLTest::samplingSwizzle2D() {
    #ifndef MAGNUM_TARGET_GLES
    if(!Context::current()->isExtensionSupported<Extensions::GL::ARB::texture_swizzle>())
        CORRADE_SKIP(Extensions::GL::ARB::texture_swizzle::string() + std::string(" is not supported."));
    #endif

    Texture2D texture;
    texture.setSwizzle<'b', 'g', 'r', '0'>();

    MAGNUM_VERIFY_NO_ERROR();
}
#else
void TextureGLTest::samplingMaxLevel2D() {
    if(!Context::current()->isExtensionSupported<Extensions::GL::APPLE::texture_max_level>())
        CORRADE_SKIP(Extensions::GL::APPLE::texture_max_level::string() + std::string(" is not supported."));

    Texture2D texture;
    texture.setMaxLevel(750);

    MAGNUM_VERIFY_NO_ERROR();
}

void TextureGLTest::samplingCompare2D() {
    if(!Context::current()->isExtensionSupported<Extensions::GL::EXT::shadow_samplers>())
        CORRADE_SKIP(Extensions::GL::EXT::shadow_samplers::string() + std::string(" is not supported."));

    Texture2D texture;
    texture.setCompareMode(Sampler::CompareMode::CompareRefToTexture)
           .setCompareFunction(Sampler::CompareFunction::GreaterOrEqual);

    MAGNUM_VERIFY_NO_ERROR();
}
#endif

#ifndef MAGNUM_TARGET_GLES
void TextureGLTest::samplingBorderInteger2D() {
    if(!Context::current()->isExtensionSupported<Extensions::GL::EXT::texture_integer>())
        CORRADE_SKIP(Extensions::GL::EXT::texture_integer::string() + std::string(" is not supported."));

    Texture2D a;
    a.setWrapping(Sampler::Wrapping::ClampToBorder)
     .setBorderColor(Vector4i(1, 56, 78, -2));
    Texture2D b;
    b.setWrapping(Sampler::Wrapping::ClampToBorder)
     .setBorderColor(Vector4ui(35, 56, 78, 15));

    MAGNUM_VERIFY_NO_ERROR();
}
#endif

#ifndef MAGNUM_TARGET_GLES2
void TextureGLTest::samplingDepthStencilMode2D() {
    #ifndef MAGNUM_TARGET_GLES
    if(!Context::current()->isExtensionSupported<Extensions::GL::ARB::stencil_texturing>())
        CORRADE_SKIP(Extensions::GL::ARB::stencil_texturing::string() + std::string(" is not supported."));
    #else
    if(!Context::current()->isVersionSupported(Version::GLES310))
        CORRADE_SKIP("OpenGL ES 3.1 is not supported.");
    #endif

    Texture2D texture;
    texture.setDepthStencilMode(Sampler::DepthStencilMode::StencilIndex);

    MAGNUM_VERIFY_NO_ERROR();
}
#endif

#ifdef MAGNUM_TARGET_GLES
void TextureGLTest::samplingBorder2D() {
    if(!Context::current()->isExtensionSupported<Extensions::GL::NV::texture_border_clamp>())
        CORRADE_SKIP(Extensions::GL::NV::texture_border_clamp::string() + std::string(" is not supported."));

    Texture2D texture;
    texture.setWrapping(Sampler::Wrapping::ClampToBorder)
           .setBorderColor(Color3(0.5f));

    MAGNUM_VERIFY_NO_ERROR();
}
#endif

void TextureGLTest::sampling3D() {
    #ifdef MAGNUM_TARGET_GLES2
    if(!Context::current()->isExtensionSupported<Extensions::GL::OES::texture_3D>())
        CORRADE_SKIP(Extensions::GL::OES::texture_3D::string() + std::string(" is not supported."));
    #endif

    Texture3D texture;
    texture.setMinificationFilter(Sampler::Filter::Linear, Sampler::Mipmap::Linear)
           .setMagnificationFilter(Sampler::Filter::Linear)
           #ifndef MAGNUM_TARGET_GLES2
           .setMinLod(-750.0f)
           .setMaxLod(750.0f)
           #ifndef MAGNUM_TARGET_GLES
           .setLodBias(0.5f)
           #endif
           .setBaseLevel(1)
           .setMaxLevel(750)
           #endif
           #ifndef MAGNUM_TARGET_GLES
           .setWrapping(Sampler::Wrapping::ClampToBorder)
           .setBorderColor(Color3(0.5f))
           #else
           .setWrapping(Sampler::Wrapping::ClampToEdge)
           #endif
           .setMaxAnisotropy(Sampler::maxMaxAnisotropy());

    MAGNUM_VERIFY_NO_ERROR();
}

void TextureGLTest::samplingSRGBDecode3D() {
    #ifdef MAGNUM_TARGET_GLES2
    if(!Context::current()->isExtensionSupported<Extensions::GL::OES::texture_3D>())
        CORRADE_SKIP(Extensions::GL::OES::texture_3D::string() + std::string(" is not supported."));
    if(!Context::current()->isExtensionSupported<Extensions::GL::EXT::sRGB>())
        CORRADE_SKIP(Extensions::GL::EXT::sRGB::string() + std::string(" is not supported."));
    #endif
    if(!Context::current()->isExtensionSupported<Extensions::GL::EXT::texture_sRGB_decode>())
        CORRADE_SKIP(Extensions::GL::EXT::texture_sRGB_decode::string() + std::string(" is not supported."));

    Texture3D texture;
    texture.setSRGBDecode(false);

    MAGNUM_VERIFY_NO_ERROR();
}

#ifndef MAGNUM_TARGET_GLES2
void TextureGLTest::samplingSwizzle3D() {
    #ifndef MAGNUM_TARGET_GLES
    if(!Context::current()->isExtensionSupported<Extensions::GL::ARB::texture_swizzle>())
        CORRADE_SKIP(Extensions::GL::ARB::texture_swizzle::string() + std::string(" is not supported."));
    #endif

    Texture3D texture;
    texture.setSwizzle<'b', 'g', 'r', '0'>();

    MAGNUM_VERIFY_NO_ERROR();
}
#else
void TextureGLTest::samplingMaxLevel3D() {
    if(!Context::current()->isExtensionSupported<Extensions::GL::OES::texture_3D>())
        CORRADE_SKIP(Extensions::GL::OES::texture_3D::string() + std::string(" is not supported."));
    if(!Context::current()->isExtensionSupported<Extensions::GL::APPLE::texture_max_level>())
        CORRADE_SKIP(Extensions::GL::APPLE::texture_max_level::string() + std::string(" is not supported."));

    Texture3D texture;
    texture.setMaxLevel(750);

    MAGNUM_VERIFY_NO_ERROR();
}
#endif

#ifndef MAGNUM_TARGET_GLES
void TextureGLTest::samplingBorderInteger3D() {
    if(!Context::current()->isExtensionSupported<Extensions::GL::EXT::texture_integer>())
        CORRADE_SKIP(Extensions::GL::EXT::texture_integer::string() + std::string(" is not supported."));

    Texture3D a;
    a.setWrapping(Sampler::Wrapping::ClampToBorder)
     .setBorderColor(Vector4i(1, 56, 78, -2));
    Texture3D b;
    b.setWrapping(Sampler::Wrapping::ClampToBorder)
     .setBorderColor(Vector4ui(35, 56, 78, 15));

    MAGNUM_VERIFY_NO_ERROR();
}
#endif

#ifndef MAGNUM_TARGET_GLES2
void TextureGLTest::samplingDepthStencilMode3D() {
    #ifndef MAGNUM_TARGET_GLES
    if(!Context::current()->isExtensionSupported<Extensions::GL::ARB::stencil_texturing>())
        CORRADE_SKIP(Extensions::GL::ARB::stencil_texturing::string() + std::string(" is not supported."));
    #else
    if(!Context::current()->isVersionSupported(Version::GLES310))
        CORRADE_SKIP("OpenGL ES 3.1 is not supported.");
    #endif

    Texture3D texture;
    texture.setDepthStencilMode(Sampler::DepthStencilMode::StencilIndex);

    MAGNUM_VERIFY_NO_ERROR();
}
#endif

#ifdef MAGNUM_TARGET_GLES
void TextureGLTest::samplingBorder3D() {
    #ifdef MAGNUM_TARGET_GLES2
    if(!Context::current()->isExtensionSupported<Extensions::GL::OES::texture_3D>())
        CORRADE_SKIP(Extensions::GL::OES::texture_3D::string() + std::string(" is not supported."));
    #endif

    if(!Context::current()->isExtensionSupported<Extensions::GL::NV::texture_border_clamp>())
        CORRADE_SKIP(Extensions::GL::NV::texture_border_clamp::string() + std::string(" is not supported."));

    Texture3D texture;
    texture.setWrapping(Sampler::Wrapping::ClampToBorder)
           .setBorderColor(Color3(0.5f));

    MAGNUM_VERIFY_NO_ERROR();
}
#endif

#ifndef MAGNUM_TARGET_GLES
void TextureGLTest::storage1D() {
    Texture1D texture;
    texture.setStorage(5, TextureFormat::RGBA8, 32);

    MAGNUM_VERIFY_NO_ERROR();

    CORRADE_COMPARE(texture.imageSize(0), 32);
    CORRADE_COMPARE(texture.imageSize(1), 16);
    CORRADE_COMPARE(texture.imageSize(2),  8);
    CORRADE_COMPARE(texture.imageSize(3),  4);
    CORRADE_COMPARE(texture.imageSize(4),  2);
    CORRADE_COMPARE(texture.imageSize(5),  0); /* not available */

    MAGNUM_VERIFY_NO_ERROR();
}
#endif

void TextureGLTest::storage2D() {
    Texture2D texture;
    texture.setStorage(5, TextureFormat::RGBA8, Vector2i(32));

    MAGNUM_VERIFY_NO_ERROR();

    #ifndef MAGNUM_TARGET_GLES2
    #ifdef MAGNUM_TARGET_GLES
    if(!Context::current()->isVersionSupported(Version::GLES310))
        CORRADE_SKIP("OpenGL ES 3.1 not supported, skipping image size testing.");
    #endif

    CORRADE_COMPARE(texture.imageSize(0), Vector2i(32));
    CORRADE_COMPARE(texture.imageSize(1), Vector2i(16));
    CORRADE_COMPARE(texture.imageSize(2), Vector2i( 8));
    CORRADE_COMPARE(texture.imageSize(3), Vector2i( 4));
    CORRADE_COMPARE(texture.imageSize(4), Vector2i( 2));
    CORRADE_COMPARE(texture.imageSize(5), Vector2i( 0)); /* not available */

    MAGNUM_VERIFY_NO_ERROR();
    #endif
}

void TextureGLTest::storage3D() {
    #ifdef MAGNUM_TARGET_GLES2
    if(!Context::current()->isExtensionSupported<Extensions::GL::OES::texture_3D>())
        CORRADE_SKIP(Extensions::GL::OES::texture_3D::string() + std::string(" is not supported."));
    #endif

    Texture3D texture;
    texture.setStorage(5, TextureFormat::RGBA8, Vector3i(32));

    MAGNUM_VERIFY_NO_ERROR();

    #ifndef MAGNUM_TARGET_GLES2
    #ifdef MAGNUM_TARGET_GLES
    if(!Context::current()->isVersionSupported(Version::GLES310))
        CORRADE_SKIP("OpenGL ES 3.1 not supported, skipping image size testing.");
    #endif

    CORRADE_COMPARE(texture.imageSize(0), Vector3i(32));
    CORRADE_COMPARE(texture.imageSize(1), Vector3i(16));
    CORRADE_COMPARE(texture.imageSize(2), Vector3i( 8));
    CORRADE_COMPARE(texture.imageSize(3), Vector3i( 4));
    CORRADE_COMPARE(texture.imageSize(4), Vector3i( 2));
    CORRADE_COMPARE(texture.imageSize(5), Vector3i( 0)); /* not available */

    MAGNUM_VERIFY_NO_ERROR();
    #endif
}

namespace {
    constexpr UnsignedByte Data1D[] = { 0x00, 0x01, 0x02, 0x03,
                                        0x04, 0x05, 0x06, 0x07 };
}

#ifndef MAGNUM_TARGET_GLES
void TextureGLTest::image1D() {
    Texture1D texture;
    texture.setImage(0, TextureFormat::RGBA8,
        ImageReference1D(ColorFormat::RGBA, ColorType::UnsignedByte, 2, Data1D));

    MAGNUM_VERIFY_NO_ERROR();

    Image1D image = texture.image(0, {ColorFormat::RGBA, ColorType::UnsignedByte});

    MAGNUM_VERIFY_NO_ERROR();

    CORRADE_COMPARE(image.size(), 2);
    CORRADE_COMPARE_AS(
        Containers::ArrayView<const UnsignedByte>(image.data<UnsignedByte>(), image.pixelSize()*image.size().product()),
        Containers::ArrayView<const UnsignedByte>{Data1D}, TestSuite::Compare::Container);
}

void TextureGLTest::image1DBuffer() {
    Texture1D texture;
    texture.setImage(0, TextureFormat::RGBA8,
        BufferImage1D(ColorFormat::RGBA, ColorType::UnsignedByte, 2, Data1D, BufferUsage::StaticDraw));

    MAGNUM_VERIFY_NO_ERROR();

    BufferImage1D image = texture.image(0, {ColorFormat::RGBA, ColorType::UnsignedByte}, BufferUsage::StaticDraw);
    const auto imageData = image.buffer().data<UnsignedByte>();

    MAGNUM_VERIFY_NO_ERROR();

    CORRADE_COMPARE(image.size(), 2);
    CORRADE_COMPARE_AS(imageData, Containers::ArrayView<const UnsignedByte>{Data1D}, TestSuite::Compare::Container);
}
#endif

namespace {
    constexpr UnsignedByte Data2D[] = { 0x00, 0x01, 0x02, 0x03,
                                        0x04, 0x05, 0x06, 0x07,
                                        0x08, 0x09, 0x0a, 0x0b,
                                        0x0c, 0x0d, 0x0e, 0x0f };
}

void TextureGLTest::image2D() {
    Texture2D texture;
    texture.setImage(0, TextureFormat::RGBA8,
        ImageReference2D(ColorFormat::RGBA, ColorType::UnsignedByte, Vector2i(2), Data2D));

    MAGNUM_VERIFY_NO_ERROR();

    /** @todo How to test this on ES? */
    #ifndef MAGNUM_TARGET_GLES
    Image2D image = texture.image(0, {ColorFormat::RGBA, ColorType::UnsignedByte});

    MAGNUM_VERIFY_NO_ERROR();

    CORRADE_COMPARE(image.size(), Vector2i(2));
    CORRADE_COMPARE_AS(
        Containers::ArrayView<const UnsignedByte>(image.data<UnsignedByte>(), image.pixelSize()*image.size().product()),
        Containers::ArrayView<const UnsignedByte>{Data2D}, TestSuite::Compare::Container);
    #endif
}

#ifndef MAGNUM_TARGET_GLES2
void TextureGLTest::image2DBuffer() {
    Texture2D texture;
    texture.setImage(0, TextureFormat::RGBA8,
        BufferImage2D(ColorFormat::RGBA, ColorType::UnsignedByte, Vector2i(2), Data2D, BufferUsage::StaticDraw));

    MAGNUM_VERIFY_NO_ERROR();

    /** @todo How to test this on ES? */
    #ifndef MAGNUM_TARGET_GLES
    BufferImage2D image = texture.image(0, {ColorFormat::RGBA, ColorType::UnsignedByte}, BufferUsage::StaticRead);
    const auto imageData = image.buffer().data<UnsignedByte>();

    MAGNUM_VERIFY_NO_ERROR();

    CORRADE_COMPARE(image.size(), Vector2i(2));
    CORRADE_COMPARE_AS(imageData, Containers::ArrayView<const UnsignedByte>{Data2D}, TestSuite::Compare::Container);
    #endif
}
#endif

namespace {
    constexpr UnsignedByte Data3D[] = { 0x00, 0x01, 0x02, 0x03,
                                        0x04, 0x05, 0x06, 0x07,
                                        0x08, 0x09, 0x0a, 0x0b,
                                        0x0c, 0x0d, 0x0e, 0x0f,
                                        0x10, 0x11, 0x12, 0x13,
                                        0x14, 0x15, 0x16, 0x17,
                                        0x18, 0x19, 0x1a, 0x1b,
                                        0x1c, 0x1d, 0x1e, 0x1f };
}

void TextureGLTest::image3D() {
    #ifdef MAGNUM_TARGET_GLES2
    if(!Context::current()->isExtensionSupported<Extensions::GL::OES::texture_3D>())
        CORRADE_SKIP(Extensions::GL::OES::texture_3D::string() + std::string(" is not supported."));
    #endif

    Texture3D texture;
    texture.setImage(0, TextureFormat::RGBA8,
        ImageReference3D(ColorFormat::RGBA, ColorType::UnsignedByte, Vector3i(2), Data3D));

    MAGNUM_VERIFY_NO_ERROR();

    /** @todo How to test this on ES? */
    #ifndef MAGNUM_TARGET_GLES
    Image3D image = texture.image(0, {ColorFormat::RGBA, ColorType::UnsignedByte});

    MAGNUM_VERIFY_NO_ERROR();

    CORRADE_COMPARE(image.size(), Vector3i(2));
    CORRADE_COMPARE_AS(
        Containers::ArrayView<const UnsignedByte>(image.data<UnsignedByte>(), image.pixelSize()*image.size().product()),
        Containers::ArrayView<const UnsignedByte>{Data3D}, TestSuite::Compare::Container);
    #endif
}

#ifndef MAGNUM_TARGET_GLES2
void TextureGLTest::image3DBuffer() {
    Texture3D texture;
    texture.setImage(0, TextureFormat::RGBA8,
        BufferImage3D(ColorFormat::RGBA, ColorType::UnsignedByte, Vector3i(2), Data3D, BufferUsage::StaticDraw));

    MAGNUM_VERIFY_NO_ERROR();

    /** @todo How to test this on ES? */
    #ifndef MAGNUM_TARGET_GLES
    BufferImage3D image = texture.image(0, {ColorFormat::RGBA, ColorType::UnsignedByte}, BufferUsage::StaticRead);
    const auto imageData = image.buffer().data<UnsignedByte>();

    MAGNUM_VERIFY_NO_ERROR();

    CORRADE_COMPARE(image.size(), Vector3i(2));
    CORRADE_COMPARE_AS(imageData, Containers::ArrayView<const UnsignedByte>{Data3D}, TestSuite::Compare::Container);
    #endif
}
#endif

namespace {
    constexpr UnsignedByte Zero1D[4*4] = {};
    constexpr UnsignedByte SubData1DComplete[] = {
        0, 0, 0, 0, 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0, 0, 0, 0
    };
}

#ifndef MAGNUM_TARGET_GLES
void TextureGLTest::subImage1D() {
    Texture1D texture;
    texture.setImage(0, TextureFormat::RGBA8,
        ImageReference1D(ColorFormat::RGBA, ColorType::UnsignedByte, 4, Zero1D));
    texture.setSubImage(0, 1,
        ImageReference1D(ColorFormat::RGBA, ColorType::UnsignedByte, 2, Data1D));

    MAGNUM_VERIFY_NO_ERROR();

    Image1D image = texture.image(0, {ColorFormat::RGBA, ColorType::UnsignedByte});

    MAGNUM_VERIFY_NO_ERROR();

    CORRADE_COMPARE(image.size(), 4);
    CORRADE_COMPARE_AS(
        Containers::ArrayView<const UnsignedByte>(image.data<UnsignedByte>(), image.pixelSize()*image.size().product()),
        Containers::ArrayView<const UnsignedByte>{SubData1DComplete}, TestSuite::Compare::Container);
}

void TextureGLTest::subImage1DBuffer() {
    Texture1D texture;
    texture.setImage(0, TextureFormat::RGBA8,
        ImageReference1D(ColorFormat::RGBA, ColorType::UnsignedByte, 4, Zero1D));
    texture.setSubImage(0, 1,
        BufferImage1D(ColorFormat::RGBA, ColorType::UnsignedByte, 2, Data1D, BufferUsage::StaticDraw));

    MAGNUM_VERIFY_NO_ERROR();

    BufferImage1D image = texture.image(0, {ColorFormat::RGBA, ColorType::UnsignedByte}, BufferUsage::StaticRead);
    const auto imageData = image.buffer().data<UnsignedByte>();

    MAGNUM_VERIFY_NO_ERROR();

    CORRADE_COMPARE(image.size(), 4);
    CORRADE_COMPARE_AS(imageData, Containers::ArrayView<const UnsignedByte>{SubData1DComplete}, TestSuite::Compare::Container);
}

void TextureGLTest::subImage1DQuery() {
    if(!Context::current()->isExtensionSupported<Extensions::GL::ARB::get_texture_sub_image>())
        CORRADE_SKIP(Extensions::GL::ARB::get_texture_sub_image::string() + std::string(" is not supported."));

    Texture1D texture;
    texture.setStorage(1, TextureFormat::RGBA8, 4)
           .setSubImage(0, {}, ImageReference1D{ColorFormat::RGBA, ColorType::UnsignedByte, 4, SubData1DComplete});

    MAGNUM_VERIFY_NO_ERROR();

    Image1D image = texture.subImage(0, Range1Di::fromSize(1, 2), {ColorFormat::RGBA, ColorType::UnsignedByte});

    MAGNUM_VERIFY_NO_ERROR();

    CORRADE_COMPARE(image.size(), 2);
    CORRADE_COMPARE_AS(
        Containers::ArrayView<const UnsignedByte>(image.data<UnsignedByte>(), image.pixelSize()*image.size().product()), Containers::ArrayView<const UnsignedByte>{Data1D}, TestSuite::Compare::Container);
}

void TextureGLTest::subImage1DQueryBuffer() {
    if(!Context::current()->isExtensionSupported<Extensions::GL::ARB::get_texture_sub_image>())
        CORRADE_SKIP(Extensions::GL::ARB::get_texture_sub_image::string() + std::string(" is not supported."));

    Texture1D texture;
    texture.setStorage(1, TextureFormat::RGBA8, 4)
           .setSubImage(0, {}, ImageReference1D{ColorFormat::RGBA, ColorType::UnsignedByte, 4, SubData1DComplete});

    MAGNUM_VERIFY_NO_ERROR();

    BufferImage1D image = texture.subImage(0, Range1Di::fromSize(1, 2), {ColorFormat::RGBA, ColorType::UnsignedByte}, BufferUsage::StaticRead);
    const auto imageData = image.buffer().data<UnsignedByte>();

    MAGNUM_VERIFY_NO_ERROR();

    CORRADE_COMPARE(image.size(), 2);
    CORRADE_COMPARE_AS(imageData, Containers::ArrayView<const UnsignedByte>{Data1D}, TestSuite::Compare::Container);
}
#endif

namespace {
    constexpr UnsignedByte Zero2D[4*4*4] = {};
    constexpr UnsignedByte SubData2DComplete[] = {
        0, 0, 0, 0,    0,    0,    0,    0,    0,    0,    0,    0, 0, 0, 0, 0,
        0, 0, 0, 0, 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0, 0, 0, 0,
        0, 0, 0, 0, 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f, 0, 0, 0, 0,
        0, 0, 0, 0,    0,    0,    0,    0,    0,    0,    0,    0, 0, 0, 0, 0
    };
}

void TextureGLTest::subImage2D() {
    Texture2D texture;
    texture.setImage(0, TextureFormat::RGBA8,
        ImageReference2D(ColorFormat::RGBA, ColorType::UnsignedByte, Vector2i(4), Zero2D));
    texture.setSubImage(0, Vector2i(1),
        ImageReference2D(ColorFormat::RGBA, ColorType::UnsignedByte, Vector2i(2), Data2D));

    MAGNUM_VERIFY_NO_ERROR();

    /** @todo How to test this on ES? */
    #ifndef MAGNUM_TARGET_GLES
    Image2D image = texture.image(0, {ColorFormat::RGBA, ColorType::UnsignedByte});

    MAGNUM_VERIFY_NO_ERROR();

    CORRADE_COMPARE(image.size(), Vector2i(4));
    CORRADE_COMPARE_AS(
        Containers::ArrayView<const UnsignedByte>(image.data<UnsignedByte>(), image.pixelSize()*image.size().product()),
        Containers::ArrayView<const UnsignedByte>{SubData2DComplete}, TestSuite::Compare::Container);
    #endif
}

#ifndef MAGNUM_TARGET_GLES2
void TextureGLTest::subImage2DBuffer() {
    Texture2D texture;
    texture.setImage(0, TextureFormat::RGBA8,
        ImageReference2D(ColorFormat::RGBA, ColorType::UnsignedByte, Vector2i(4), Zero2D));
    texture.setSubImage(0, Vector2i(1),
        BufferImage2D(ColorFormat::RGBA, ColorType::UnsignedByte, Vector2i(2), Data2D, BufferUsage::StaticDraw));

    MAGNUM_VERIFY_NO_ERROR();

    /** @todo How to test this on ES? */
    #ifndef MAGNUM_TARGET_GLES
    BufferImage2D image = texture.image(0, {ColorFormat::RGBA, ColorType::UnsignedByte}, BufferUsage::StaticRead);
    const auto imageData = image.buffer().data<UnsignedByte>();

    MAGNUM_VERIFY_NO_ERROR();

    CORRADE_COMPARE(image.size(), Vector2i(4));
    CORRADE_COMPARE_AS(imageData, Containers::ArrayView<const UnsignedByte>{SubData2DComplete}, TestSuite::Compare::Container);
    #endif
}
#endif

#ifndef MAGNUM_TARGET_GLES
void TextureGLTest::subImage2DQuery() {
    if(!Context::current()->isExtensionSupported<Extensions::GL::ARB::get_texture_sub_image>())
        CORRADE_SKIP(Extensions::GL::ARB::get_texture_sub_image::string() + std::string(" is not supported."));

    Texture2D texture;
    texture.setStorage(1, TextureFormat::RGBA8, Vector2i{4})
           .setSubImage(0, {}, ImageReference2D{ColorFormat::RGBA, ColorType::UnsignedByte, Vector2i{4}, SubData2DComplete});

    MAGNUM_VERIFY_NO_ERROR();

    Image2D image = texture.subImage(0, Range2Di::fromSize(Vector2i{1}, Vector2i{2}), {ColorFormat::RGBA, ColorType::UnsignedByte});

    MAGNUM_VERIFY_NO_ERROR();

    CORRADE_COMPARE(image.size(), Vector2i{2});
    CORRADE_COMPARE_AS(
        Containers::ArrayView<const UnsignedByte>(image.data<UnsignedByte>(), image.pixelSize()*image.size().product()), Containers::ArrayView<const UnsignedByte>{Data2D}, TestSuite::Compare::Container);
}

void TextureGLTest::subImage2DQueryBuffer() {
    if(!Context::current()->isExtensionSupported<Extensions::GL::ARB::get_texture_sub_image>())
        CORRADE_SKIP(Extensions::GL::ARB::get_texture_sub_image::string() + std::string(" is not supported."));

    Texture2D texture;
    texture.setStorage(1, TextureFormat::RGBA8, Vector2i{4})
           .setSubImage(0, {}, ImageReference2D{ColorFormat::RGBA, ColorType::UnsignedByte, Vector2i{4}, SubData2DComplete});

    MAGNUM_VERIFY_NO_ERROR();

    BufferImage2D image = texture.subImage(0, Range2Di::fromSize(Vector2i{1}, Vector2i{2}), {ColorFormat::RGBA, ColorType::UnsignedByte}, BufferUsage::StaticRead);
    const auto imageData = image.buffer().data<UnsignedByte>();

    MAGNUM_VERIFY_NO_ERROR();

    CORRADE_COMPARE(image.size(), Vector2i{2});
    CORRADE_COMPARE_AS(imageData, Containers::ArrayView<const UnsignedByte>{Data2D}, TestSuite::Compare::Container);
}
#endif

namespace {
    constexpr UnsignedByte Zero3D[4*4*4*4] = {};
    constexpr UnsignedByte SubData3DComplete[] = {
        0, 0, 0, 0,    0,    0,    0,    0,    0,    0,    0,    0, 0, 0, 0, 0,
        0, 0, 0, 0,    0,    0,    0,    0,    0,    0,    0,    0, 0, 0, 0, 0,
        0, 0, 0, 0,    0,    0,    0,    0,    0,    0,    0,    0, 0, 0, 0, 0,
        0, 0, 0, 0,    0,    0,    0,    0,    0,    0,    0,    0, 0, 0, 0, 0,

        0, 0, 0, 0,    0,    0,    0,    0,    0,    0,    0,    0, 0, 0, 0, 0,
        0, 0, 0, 0, 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0, 0, 0, 0,
        0, 0, 0, 0, 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f, 0, 0, 0, 0,
        0, 0, 0, 0,    0,    0,    0,    0,    0,    0,    0,    0, 0, 0, 0, 0,

        0, 0, 0, 0,    0,    0,    0,    0,    0,    0,    0,    0, 0, 0, 0, 0,
        0, 0, 0, 0, 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, 0, 0, 0, 0,
        0, 0, 0, 0, 0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f, 0, 0, 0, 0,
        0, 0, 0, 0,    0,    0,    0,    0,    0,    0,    0,    0, 0, 0, 0, 0,

        0, 0, 0, 0,    0,    0,    0,    0,    0,    0,    0,    0, 0, 0, 0, 0,
        0, 0, 0, 0,    0,    0,    0,    0,    0,    0,    0,    0, 0, 0, 0, 0,
        0, 0, 0, 0,    0,    0,    0,    0,    0,    0,    0,    0, 0, 0, 0, 0,
        0, 0, 0, 0,    0,    0,    0,    0,    0,    0,    0,    0, 0, 0, 0, 0
    };
}

void TextureGLTest::subImage3D() {
    #ifdef MAGNUM_TARGET_GLES2
    if(!Context::current()->isExtensionSupported<Extensions::GL::OES::texture_3D>())
        CORRADE_SKIP(Extensions::GL::OES::texture_3D::string() + std::string(" is not supported."));
    #endif

    Texture3D texture;
    texture.setImage(0, TextureFormat::RGBA8,
        ImageReference3D(ColorFormat::RGBA, ColorType::UnsignedByte, Vector3i(4), Zero3D));
    texture.setSubImage(0, Vector3i(1),
        ImageReference3D(ColorFormat::RGBA, ColorType::UnsignedByte, Vector3i(2), Data3D));

    MAGNUM_VERIFY_NO_ERROR();

    /** @todo How to test this on ES? */
    #ifndef MAGNUM_TARGET_GLES
    Image3D image = texture.image(0, {ColorFormat::RGBA, ColorType::UnsignedByte});

    MAGNUM_VERIFY_NO_ERROR();

    CORRADE_COMPARE(image.size(), Vector3i(4));
    CORRADE_COMPARE_AS(
        Containers::ArrayView<const UnsignedByte>(image.data<UnsignedByte>(), image.pixelSize()*image.size().product()),
        Containers::ArrayView<const UnsignedByte>{SubData3DComplete}, TestSuite::Compare::Container);
    #endif
}

#ifndef MAGNUM_TARGET_GLES2
void TextureGLTest::subImage3DBuffer() {
    Texture3D texture;
    texture.setImage(0, TextureFormat::RGBA8,
        ImageReference3D(ColorFormat::RGBA, ColorType::UnsignedByte, Vector3i(4), Zero3D));
    texture.setSubImage(0, Vector3i(1),
        BufferImage3D(ColorFormat::RGBA, ColorType::UnsignedByte, Vector3i(2), Data3D, BufferUsage::StaticDraw));

    MAGNUM_VERIFY_NO_ERROR();

    /** @todo How to test this on ES? */
    #ifndef MAGNUM_TARGET_GLES
    BufferImage3D image = texture.image(0, {ColorFormat::RGBA, ColorType::UnsignedByte}, BufferUsage::StaticRead);
    const auto imageData = image.buffer().data<UnsignedByte>();

    MAGNUM_VERIFY_NO_ERROR();

    CORRADE_COMPARE(image.size(), Vector3i(4));
    CORRADE_COMPARE_AS(imageData, Containers::ArrayView<const UnsignedByte>{SubData3DComplete}, TestSuite::Compare::Container);
    #endif
}
#endif

#ifndef MAGNUM_TARGET_GLES
void TextureGLTest::subImage3DQuery() {
    if(!Context::current()->isExtensionSupported<Extensions::GL::ARB::get_texture_sub_image>())
        CORRADE_SKIP(Extensions::GL::ARB::get_texture_sub_image::string() + std::string(" is not supported."));

    Texture3D texture;
    texture.setStorage(1, TextureFormat::RGBA8, Vector3i{4})
           .setSubImage(0, {}, ImageReference3D{ColorFormat::RGBA, ColorType::UnsignedByte, Vector3i{4}, SubData3DComplete});

    MAGNUM_VERIFY_NO_ERROR();

    Image3D image = texture.subImage(0, Range3Di::fromSize(Vector3i{1}, Vector3i{2}), {ColorFormat::RGBA, ColorType::UnsignedByte});

    MAGNUM_VERIFY_NO_ERROR();

    CORRADE_COMPARE(image.size(), Vector3i{2});
    CORRADE_COMPARE_AS(
        Containers::ArrayView<const UnsignedByte>(image.data<UnsignedByte>(), image.pixelSize()*image.size().product()), Containers::ArrayView<const UnsignedByte>{Data3D}, TestSuite::Compare::Container);
}

void TextureGLTest::subImage3DQueryBuffer() {
    if(!Context::current()->isExtensionSupported<Extensions::GL::ARB::get_texture_sub_image>())
        CORRADE_SKIP(Extensions::GL::ARB::get_texture_sub_image::string() + std::string(" is not supported."));

    Texture3D texture;
    texture.setStorage(1, TextureFormat::RGBA8, Vector3i{4})
           .setSubImage(0, {}, ImageReference3D{ColorFormat::RGBA, ColorType::UnsignedByte, Vector3i{4}, SubData3DComplete});

    MAGNUM_VERIFY_NO_ERROR();

    BufferImage3D image = texture.subImage(0, Range3Di::fromSize(Vector3i{1}, Vector3i{2}), {ColorFormat::RGBA, ColorType::UnsignedByte}, BufferUsage::StaticRead);
    const auto imageData = image.buffer().data<UnsignedByte>();

    MAGNUM_VERIFY_NO_ERROR();

    CORRADE_COMPARE(image.size(), Vector3i{2});
    CORRADE_COMPARE_AS(imageData, Containers::ArrayView<const UnsignedByte>{Data3D}, TestSuite::Compare::Container);
}

void TextureGLTest::generateMipmap1D() {
    if(!Context::current()->isExtensionSupported<Extensions::GL::ARB::framebuffer_object>())
        CORRADE_SKIP(Extensions::GL::ARB::framebuffer_object::string() + std::string(" is not supported."));

    Texture1D texture;
    texture.setImage(0, TextureFormat::RGBA8,
        ImageReference1D(ColorFormat::RGBA, ColorType::UnsignedByte, 32));

    CORRADE_COMPARE(texture.imageSize(0), 32);
    CORRADE_COMPARE(texture.imageSize(1),  0);

    texture.generateMipmap();

    MAGNUM_VERIFY_NO_ERROR();

    CORRADE_COMPARE(texture.imageSize(0), 32);
    CORRADE_COMPARE(texture.imageSize(1), 16);
    CORRADE_COMPARE(texture.imageSize(2),  8);
    CORRADE_COMPARE(texture.imageSize(3),  4);
    CORRADE_COMPARE(texture.imageSize(4),  2);
    CORRADE_COMPARE(texture.imageSize(5),  1);

    MAGNUM_VERIFY_NO_ERROR();
}
#endif

void TextureGLTest::generateMipmap2D() {
    #ifndef MAGNUM_TARGET_GLES
    if(!Context::current()->isExtensionSupported<Extensions::GL::ARB::framebuffer_object>())
        CORRADE_SKIP(Extensions::GL::ARB::framebuffer_object::string() + std::string(" is not supported."));
    #endif

    Texture2D texture;
    texture.setImage(0, TextureFormat::RGBA8,
        ImageReference2D(ColorFormat::RGBA, ColorType::UnsignedByte, Vector2i(32)));

    /** @todo How to test this on ES? */
    #ifndef MAGNUM_TARGET_GLES
    CORRADE_COMPARE(texture.imageSize(0), Vector2i(32));
    CORRADE_COMPARE(texture.imageSize(1), Vector2i( 0));
    #endif

    texture.generateMipmap();

    MAGNUM_VERIFY_NO_ERROR();

    /** @todo How to test this on ES? */
    #ifndef MAGNUM_TARGET_GLES
    CORRADE_COMPARE(texture.imageSize(0), Vector2i(32));
    CORRADE_COMPARE(texture.imageSize(1), Vector2i(16));
    CORRADE_COMPARE(texture.imageSize(2), Vector2i( 8));
    CORRADE_COMPARE(texture.imageSize(3), Vector2i( 4));
    CORRADE_COMPARE(texture.imageSize(4), Vector2i( 2));
    CORRADE_COMPARE(texture.imageSize(5), Vector2i( 1));

    MAGNUM_VERIFY_NO_ERROR();
    #endif
}

void TextureGLTest::generateMipmap3D() {
    #ifndef MAGNUM_TARGET_GLES
    if(!Context::current()->isExtensionSupported<Extensions::GL::ARB::framebuffer_object>())
        CORRADE_SKIP(Extensions::GL::ARB::framebuffer_object::string() + std::string(" is not supported."));
    #elif defined(MAGNUM_TARGET_GLES2)
    if(!Context::current()->isExtensionSupported<Extensions::GL::OES::texture_3D>())
        CORRADE_SKIP(Extensions::GL::OES::texture_3D::string() + std::string(" is not supported."));
    #endif

    Texture3D texture;
    texture.setImage(0, TextureFormat::RGBA8,
        ImageReference3D(ColorFormat::RGBA, ColorType::UnsignedByte, Vector3i(32)));

    /** @todo How to test this on ES? */
    #ifndef MAGNUM_TARGET_GLES
    CORRADE_COMPARE(texture.imageSize(0), Vector3i(32));
    CORRADE_COMPARE(texture.imageSize(1), Vector3i( 0));
    #endif

    texture.generateMipmap();

    MAGNUM_VERIFY_NO_ERROR();

    /** @todo How to test this on ES? */
    #ifndef MAGNUM_TARGET_GLES
    CORRADE_COMPARE(texture.imageSize(0), Vector3i(32));
    CORRADE_COMPARE(texture.imageSize(1), Vector3i(16));
    CORRADE_COMPARE(texture.imageSize(2), Vector3i( 8));
    CORRADE_COMPARE(texture.imageSize(3), Vector3i( 4));
    CORRADE_COMPARE(texture.imageSize(4), Vector3i( 2));
    CORRADE_COMPARE(texture.imageSize(5), Vector3i( 1));

    MAGNUM_VERIFY_NO_ERROR();
    #endif
}

#ifndef MAGNUM_TARGET_GLES
void TextureGLTest::invalidateImage1D() {
    Texture1D texture;
    texture.setStorage(2, TextureFormat::RGBA8, 32);
    texture.invalidateImage(1);

    MAGNUM_VERIFY_NO_ERROR();
}
#endif

void TextureGLTest::invalidateImage2D() {
    Texture2D texture;
    texture.setStorage(2, TextureFormat::RGBA8, Vector2i(32));
    texture.invalidateImage(1);

    MAGNUM_VERIFY_NO_ERROR();
}

void TextureGLTest::invalidateImage3D() {
    #ifdef MAGNUM_TARGET_GLES2
    if(!Context::current()->isExtensionSupported<Extensions::GL::OES::texture_3D>())
        CORRADE_SKIP(Extensions::GL::OES::texture_3D::string() + std::string(" is not supported."));
    #endif

    Texture3D texture;
    texture.setStorage(2, TextureFormat::RGBA8, Vector3i(32));
    texture.invalidateImage(1);

    MAGNUM_VERIFY_NO_ERROR();
}

#ifndef MAGNUM_TARGET_GLES
void TextureGLTest::invalidateSubImage1D() {
    Texture1D texture;
    texture.setStorage(2, TextureFormat::RGBA8, 32);
    texture.invalidateSubImage(1, 2, 8);

    MAGNUM_VERIFY_NO_ERROR();
}
#endif

void TextureGLTest::invalidateSubImage2D() {
    Texture2D texture;
    texture.setStorage(2, TextureFormat::RGBA8, Vector2i(32));
    texture.invalidateSubImage(1, Vector2i(2), Vector2i(8));

    MAGNUM_VERIFY_NO_ERROR();
}

void TextureGLTest::invalidateSubImage3D() {
    #ifdef MAGNUM_TARGET_GLES2
    if(!Context::current()->isExtensionSupported<Extensions::GL::OES::texture_3D>())
        CORRADE_SKIP(Extensions::GL::OES::texture_3D::string() + std::string(" is not supported."));
    #endif

    Texture3D texture;
    texture.setStorage(2, TextureFormat::RGBA8, Vector3i(32));
    texture.invalidateSubImage(1, Vector3i(2), Vector3i(8));

    MAGNUM_VERIFY_NO_ERROR();
}

}}

CORRADE_TEST_MAIN(Magnum::Test::TextureGLTest)